The feet of a female worker of an anti-polio drive are tied by rescue workers after her body was brought to Jinnah Hospital morgue in Karachi December 18, 2012. Gunmen shot five health workers on an anti-polio drive in a string of attacks in Pakistan on Tuesday,officials said, raising fears for the safety of workers immunizing children against the crippling disease. REUTERS/Akhtar Soomro (PAKISTAN - Tags: HEALTH CIVIL UNREST)

Credit:

REUTERS

In Pakistan, seven health workers have been shot and killed while working on a nationwide polio vaccination campaign.